<template>
  <div class="container">
    <div class="app-container">
      <el-tree default-expand-all :data="depts" :props="defaultProps" :expand-on-click-node="false">
        <!-- 节点结构 -->
        <!-- v-slot="{ node, data }" 只能作用在template -->
        <template v-slot="{ data }">
          <el-row style="width: 100%; height: 40px" type="flex" justify="space-between" align="middle">
            <el-col>{{ data.name }}</el-col>
            <el-col :span="4">
              <span class="tree-manager">{{ data.managerName }}</span>
              <!-- $event 实参 表示类型 -->
              <el-dropdown trigger="click" @command="operateDept($event, data.id, data.name)">
                <!-- 显示区域内容 -->
                <span class="el-dropdown-link">
                  操作<i class="el-icon-arrow-down el-icon--right" />
                </span>
                <!-- 下拉菜单选项 -->
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item command="add">添加子部门</el-dropdown-item>
                  <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
                  <el-dropdown-item command="del">删除</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-col>
          </el-row>
        </template>
      </el-tree>
      <AddDept ref="addDept" :current-id="currentNodeId" :show-dialog.sync="showDialog" @updateDepartment="getDepartment" />
    </div>
  </div>
</template>

<script>
import { delDepartment, getDepartment } from '@/api/department'
import { transListToTreeData } from '@/utils'
import AddDept from './components/addDept'
export default {
  name: 'Department',
  components: {
    AddDept
  },
  data() {
    return {
      depts: [],
      defaultProps: {
        children: 'children',
        label: 'name'
      },
      showDialog: false,
      currentNodeId: null
    }
  },
  created() {
    this.getDepartment()
  },
  methods: {
    operateDept(type, id, name) {
      if (type === 'add') {
        this.currentNodeId = id
        this.showDialog = true
      } else if (type === 'edit') {
        this.currentNodeId = id
        this.showDialog = true
        // 调用子组件方法，获取部门信息
        // ref + $refs 可以 1.获取dom 2.获取子组件实例
        /*
          问题：
            更新子组件的props数据是异步的
            调用子组件实例身上的方法是同步的
          数据获取成功之后，再调用子组件内的方法 $nextTick()
        */
        this.$nextTick(() => {
          this.$refs.addDept.getDepartmentDetail()
        })
      } else if (type === 'del') {
        this.$confirm(`此操作将永久删除 ${name}, 是否继续?`, '温馨提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async() => {
          await delDepartment(id)
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          this.getDepartment()
        })
      }
    },
    // 获取部门列表
    async getDepartment() {
      const result = await getDepartment()
      this.depts = transListToTreeData(result, 0)
    }
  }
}
</script>

<style scoped lang="scss">
.app-container {
  padding: 30px 140px;
  font-size: 14px;
}

.tree-manager {
  width: 80px;
  display: inline-block;
  margin: 10px;
}
</style>
